1) Canonicals 2) Zucchetto 1) Zucchetto 
[Belgium] The calotte (plural calottes, French from Provençal calota or Italian callotta), is a skullcap worn by students at catholic universities in Belgium. It originates from the skullcap worn by the Papal Zouave regiment around 1860. The calotte is cylindrical, made from velvet and astrakhan (pelt of newborn lamb). The color of the top...
Roman Catholic skullcap
• (n.) Alt. of Callot
A close-fitting skull cap as worn by the Roman Catholic Clergy.
A calotte was a cap or coif worn over the tonsure by ecclesiastics in France in the 15th and 16th centuries. The name was also applied to the padded cap which knights wore under their helmet, and, during the reformation, to a close-fitting woman's head-dress.In architecture a calotte designates a flattened dome.